Recent content by wuutoshi

Should I assume that 20 g went away as CO2? So from 1 to 1 mole ratio, 0.45 moles of CaCO3 decomposed, which corresponds to 45 molecules per 100 molecules. We are left with 0.45 moles of CaO and 0.55 moles of CaCO3 which is 45 % of CaO in the final sample. Ok, the solutions agree. Thank you...

CaCO3 → CaO + CO2 Doesn't 20 g of the decomposed reactant corresponds to decomposition of 0.2 mole of that reactant? I don't assume that mass dissappeares. It appears as 20 g of products (0.4 moles of them). So now we are left with 0.8 moles of CaCO3, isn't that true? Ok.

Hello, here goes the problem: The mass of calcium carbonate upon thermal decomposition decreased by 1/5. (a) How many molecules of CaCO3 per 100 molecules were decomposed to CaO and CO2. (b) The content of CaO in the final sample express in molar fraction. My solution: I set the starting...